you'd be surprised, 3D printing isn't as expensive as you'd think it'd be

While the implant I imagine is rather cheap, I imagine the surgery is still horrifically expensive.

I think this sort of 3D printed material would initially cost $5-8K as manufacturers try to recoup some R&D spending and approvals costs. However I can easily envision this sort of product being under $1K. The materials I imagine probably are not particularly exotic and the process costs of design + printing wouldn't be particularly onerous.